GREEN MOUNTAIN RUGER 10/22 20″ STAINLESS BULL BARREL
Twenty Inches of Traditional Stainless Bull-Barrel Performance.
The Green Mountain 901521 is a full-length 20″ .920″ smooth stainless bull barrel for the Ruger 10/22. Made from 416 stainless steel with button rifling, a 1:16 twist and a Bentz .22 LR chamber, it is built for shooters who prefer substantial barrel weight and straightforward target-rifle construction.
This is an old-school, full-steel target barrel rather than an ultralight option. At 3.50 lb (3 lb 8 oz), the Green Mountain 901521 brings noticeable forward mass to a 10/22 project. Its smooth, unfluted .920″ profile is a good match for a dedicated range, bench or supported-position build. Use it for: paper targets, rimfire range practice, bench shooting and a classic stainless Ruger 10/22 build.
A Traditional Barrel, Carefully Made.
Green Mountain lists this barrel as button rifled, air gauged and stress relieved. The Bentz .22 LR chamber is intended for a target-oriented rimfire barrel, while the full .920″ bull profile keeps the configuration simple and substantial. As with any rimfire rifle, accuracy depends on ammunition, receiver fit and the rest of the build. Green Mountain specifically warns that this model is not intended for Stinger ammunition.
Product Specifications
Manufacturer: Green Mountain Rifle Barrel Co.
MPN: 901521
Platform: Ruger 10/22-pattern rifle
Caliber: .22 LR
Length: 20″
Profile: .920″ smooth bull barrel (not fluted)
Material / finish: 416 stainless steel / stainless
Rifling: Button rifled, 1:16 twist
Chamber: Bentz
Manufacturing details: Air gauged and stress relieved
Weight: Approximately 3.50 lb (3 lb 8 oz)
Muzzle threading: Not specified by Green Mountain for this MPN
Ammunition note: Not intended for Stinger ammunition
Pair It With the Small Parts That Matter.
Pete's Pillars stocks the pieces that finish a 10/22 project rather than stopping at the barrel. Our own small parts are an easy place to begin, and we also offer Volquartsen locking V-block parts for shooters choosing a locking barrel attachment option.
Pete’s Pillars Viton Bolt Buffers3-pack stainless and Viton recoil buffers.
Pete’s Pillars V-Block ScrewsCustom-machined stainless fasteners.
Buffer and Trigger Pin ComboA practical 10/22 small-part refresh.
Build It Out
Find a Home for Your 10/22 Barrel
Compare chassis and stock options, including custom Cerakote. Confirm .920″ channel clearance before selecting a model. Scroll horizontally to see every option.
MDTField Stock for Ruger 10/22Comfortable, practical stock upgrade for a fresh build.See Product →
KRGBravo for Ruger 10/22A stock and chassis solution for range use.See Product →
MDTOryx Sportsman for 10/22Substantial aluminum chassis feel.See Product →
Custom CerakoteOryx M81 Woodland 10/22A custom-finished Oryx option from Pete’s Pillars.See Product →More 10/22 Barrel Options
The Green Mountain 901521 is for someone who wants a substantial 20″ stainless barrel without fluting. For a different balance of length, finish or features, we carry other Green Mountain models, Shaw stainless barrels, Tactical Solutions X-Ring barrels and premium Volquartsen options. The Volquartsen VC10NC-28 is an especially natural comparison.
A Premium Alternative
Volquartsen VC10NC-28 — 18.5″ Stainless Match Bull Barrel
Want to move from a traditional 20″ Green Mountain bull barrel to a higher-end match-barrel option? The Volquartsen VC10NC-28 uses a .920″ stainless profile with Volquartsen's match bore and chamber, and is offered as a 1/2-28 threaded 18.5″ barrel. At approximately 3 lb 4 oz, it offers a different length, muzzle configuration and construction approach. Both brands make quality parts we're happy to carry; the better choice depends on the rifle you want to build.
Explore the Volquartsen VC10NC-28 →
Green Mountain 901501T18″ stainless .920 barrel with 1/2-28 threads.
Shaw 1022BSS1818″ polished stainless .22 LR bull barrel.
Tactical Solutions X-Ring16.5″ fluted barrel with open sights.
Complete Your 10/22
Finish the Rest of the Build
Pete’s Pillars small parts come first, followed by complementary upgrades from the brands we carry. Scroll horizontally to see every option.
Pete’s PillarsViton Stainless Bolt BuffersThree-pack for the recoil system.See Product →
Pete’s PillarsBuffer and Pin CombinationBolt buffers and trigger-assembly pins.See Product →
Pete’s PillarsStainless V-Block ScrewsHardware for a 10/22 barrel project.See Product →
KIDD10/22 CNC Bolt AssemblyA complete bolt option for your build.See Product →
TandemKrossManticore Trigger, RedComplete trigger assembly with distinct red controls.See Product →
VolquartsenBolt Tune-Up KitA focused extractor and firing-pin refresh.See Product →
Midwest Industries10/22 Scope RailA Picatinny mounting option for your optic.See Product →Triggers, Optics and Other Essentials.
The barrel is only one piece of a rifle that feels right behind the sights. KIDD single-stage triggers and the TandemKross Manticore are worth considering alongside Volquartsen options when deciding what you want from trigger feel and controls. We also carry rifle scopes, scope bases, mounts and rings, bipods, magazines, and chassis accessories so the rest of the build doesn't get overlooked.
Did You Know? Pete's Pillars Sells More Than Pillars.
From our own Made-in-USA small parts to the brands you already trust, we help shooters finish more than one corner of the build.
Frequently Asked Questions
Fitment, chamber details, build choices and complementary upgrades.
Does this barrel fit a standard Ruger 10/22?
This is a Ruger 10/22-pattern .22 LR barrel. Its .920″ bull contour is larger than a factory sporter barrel, so confirm that your receiver and stock or chassis have clearance for a .920″ barrel before ordering. Explore 10/22 stocks and chassis.
What is the chamber type?
Green Mountain lists a Bentz .22 LR chamber for the 901521. It is a target-oriented chamber, and Green Mountain specifically states that this barrel is not intended for Stinger ammunition. Use ammunition appropriate to the chamber.
What does the 3.50 lb weight mean for the build?
At approximately 3.50 lb (3 lb 8 oz), this 20″ stainless bull barrel is a substantial component. That forward weight can be welcome in a supported range or bench build, but it is worth considering if you want a lighter field rifle.
Is this barrel threaded?
Green Mountain does not specify muzzle threading on its 901521 product page. If 1/2-28 threads are important to your build, compare the Green Mountain 901501T or the Volquartsen VC10NC-28. Verify the selected barrel configuration before purchase.
How does the Green Mountain 901521 compare with the Volquartsen VC10NC-28?
The Green Mountain 901521 gives you a smooth 20″, 3.50 lb 416 stainless .920″ bull barrel with a Bentz chamber. The Volquartsen VC10NC-28 is a premium 18.5″ stainless .920″ alternative with Volquartsen match bore/chamber dimensions and 1/2-28 muzzle threading. Both are well-made options; one emphasizes traditional length and mass, while the other offers a different feature set.
Which stock or chassis can I use?
Look at the MDT Field Stock, KRG Bravo and MDT Oryx as starting points. Confirm .920″ barrel-channel clearance and action compatibility for your exact configuration before ordering.
What else is worth upgrading while building my 10/22?
Our Viton stainless recoil buffers, trigger-assembly pin and buffer combo, and stainless V-block screws are practical small-part options. We also carry KIDD single-stage triggers, TandemKross Manticore triggers, Volquartsen parts, optics and scope mounts.
Pete's Pillars carries Green Mountain barrels alongside carefully selected Ruger 10/22 upgrades.
Small Change. Big Impact. Pete's Pillars.
GREEN MOUNTAIN RUGER 10/22 20″ STAINLESS BULL BARREL
Twenty Inches of Traditional Stainless Bull-Barrel Performance.
The Green Mountain 901521 is a full-length 20″ .920″ smooth stainless bull barrel for the Ruger 10/22. Made from 416 stainless steel with button rifling, a 1:16 twist and a Bentz .22 LR chamber, it is built for shooters who prefer substantial barrel weight and straightforward target-rifle construction.
This is an old-school, full-steel target barrel rather than an ultralight option. At 3.50 lb (3 lb 8 oz), the Green Mountain 901521 brings noticeable forward mass to a 10/22 project. Its smooth, unfluted .920″ profile is a good match for a dedicated range, bench or supported-position build. Use it for: paper targets, rimfire range practice, bench shooting and a classic stainless Ruger 10/22 build.
A Traditional Barrel, Carefully Made.
Green Mountain lists this barrel as button rifled, air gauged and stress relieved. The Bentz .22 LR chamber is intended for a target-oriented rimfire barrel, while the full .920″ bull profile keeps the configuration simple and substantial. As with any rimfire rifle, accuracy depends on ammunition, receiver fit and the rest of the build. Green Mountain specifically warns that this model is not intended for Stinger ammunition.
Product Specifications
Manufacturer: Green Mountain Rifle Barrel Co.
MPN: 901521
Platform: Ruger 10/22-pattern rifle
Caliber: .22 LR
Length: 20″
Profile: .920″ smooth bull barrel (not fluted)
Material / finish: 416 stainless steel / stainless
Rifling: Button rifled, 1:16 twist
Chamber: Bentz
Manufacturing details: Air gauged and stress relieved
Weight: Approximately 3.50 lb (3 lb 8 oz)
Muzzle threading: Not specified by Green Mountain for this MPN
Ammunition note: Not intended for Stinger ammunition
Pair It With the Small Parts That Matter.
Pete's Pillars stocks the pieces that finish a 10/22 project rather than stopping at the barrel. Our own small parts are an easy place to begin, and we also offer Volquartsen locking V-block parts for shooters choosing a locking barrel attachment option.
Pete’s Pillars Viton Bolt Buffers3-pack stainless and Viton recoil buffers.
Pete’s Pillars V-Block ScrewsCustom-machined stainless fasteners.
Buffer and Trigger Pin ComboA practical 10/22 small-part refresh.
Build It Out
Find a Home for Your 10/22 Barrel
Compare chassis and stock options, including custom Cerakote. Confirm .920″ channel clearance before selecting a model. Scroll horizontally to see every option.
MDTField Stock for Ruger 10/22Comfortable, practical stock upgrade for a fresh build.See Product →KRGBravo for Ruger 10/22A stock and chassis solution for range use.See Product →MDTOryx Sportsman for 10/22Substantial aluminum chassis feel.See Product →Custom CerakoteOryx M81 Woodland 10/22A custom-finished Oryx option from Pete’s Pillars.See Product →More 10/22 Barrel Options
The Green Mountain 901521 is for someone who wants a substantial 20″ stainless barrel without fluting. For a different balance of length, finish or features, we carry other Green Mountain models, Shaw stainless barrels, Tactical Solutions X-Ring barrels and premium Volquartsen options. The Volquartsen VC10NC-28 is an especially natural comparison.
A Premium Alternative
Volquartsen VC10NC-28 — 18.5″ Stainless Match Bull Barrel
Want to move from a traditional 20″ Green Mountain bull barrel to a higher-end match-barrel option? The Volquartsen VC10NC-28 uses a .920″ stainless profile with Volquartsen's match bore and chamber, and is offered as a 1/2-28 threaded 18.5″ barrel. At approximately 3 lb 4 oz, it offers a different length, muzzle configuration and construction approach. Both brands make quality parts we're happy to carry; the better choice depends on the rifle you want to build.
Explore the Volquartsen VC10NC-28 →Green Mountain 901501T18″ stainless .920 barrel with 1/2-28 threads.
Shaw 1022BSS1818″ polished stainless .22 LR bull barrel.
Tactical Solutions X-Ring16.5″ fluted barrel with open sights.
Complete Your 10/22
Finish the Rest of the Build
Pete’s Pillars small parts come first, followed by complementary upgrades from the brands we carry. Scroll horizontally to see every option.
Pete’s PillarsViton Stainless Bolt BuffersThree-pack for the recoil system.See Product →Pete’s PillarsBuffer and Pin CombinationBolt buffers and trigger-assembly pins.See Product →Pete’s PillarsStainless V-Block ScrewsHardware for a 10/22 barrel project.See Product →KIDD10/22 CNC Bolt AssemblyA complete bolt option for your build.See Product →TandemKrossManticore Trigger, RedComplete trigger assembly with distinct red controls.See Product →VolquartsenBolt Tune-Up KitA focused extractor and firing-pin refresh.See Product →Midwest Industries10/22 Scope RailA Picatinny mounting option for your optic.See Product →Triggers, Optics and Other Essentials.
The barrel is only one piece of a rifle that feels right behind the sights. KIDD single-stage triggers and the TandemKross Manticore are worth considering alongside Volquartsen options when deciding what you want from trigger feel and controls. We also carry rifle scopes, scope bases, mounts and rings, bipods, magazines, and chassis accessories so the rest of the build doesn't get overlooked.
Did You Know? Pete's Pillars Sells More Than Pillars.
From our own Made-in-USA small parts to the brands you already trust, we help shooters finish more than one corner of the build.
Frequently Asked Questions
Fitment, chamber details, build choices and complementary upgrades.
Does this barrel fit a standard Ruger 10/22?
This is a Ruger 10/22-pattern .22 LR barrel. Its .920″ bull contour is larger than a factory sporter barrel, so confirm that your receiver and stock or chassis have clearance for a .920″ barrel before ordering. Explore 10/22 stocks and chassis.
What is the chamber type?
Green Mountain lists a Bentz .22 LR chamber for the 901521. It is a target-oriented chamber, and Green Mountain specifically states that this barrel is not intended for Stinger ammunition. Use ammunition appropriate to the chamber.
What does the 3.50 lb weight mean for the build?
At approximately 3.50 lb (3 lb 8 oz), this 20″ stainless bull barrel is a substantial component. That forward weight can be welcome in a supported range or bench build, but it is worth considering if you want a lighter field rifle.
Is this barrel threaded?
Green Mountain does not specify muzzle threading on its 901521 product page. If 1/2-28 threads are important to your build, compare the Green Mountain 901501T or the Volquartsen VC10NC-28. Verify the selected barrel configuration before purchase.
How does the Green Mountain 901521 compare with the Volquartsen VC10NC-28?
The Green Mountain 901521 gives you a smooth 20″, 3.50 lb 416 stainless .920″ bull barrel with a Bentz chamber. The Volquartsen VC10NC-28 is a premium 18.5″ stainless .920″ alternative with Volquartsen match bore/chamber dimensions and 1/2-28 muzzle threading. Both are well-made options; one emphasizes traditional length and mass, while the other offers a different feature set.
Which stock or chassis can I use?
Look at the MDT Field Stock, KRG Bravo and MDT Oryx as starting points. Confirm .920″ barrel-channel clearance and action compatibility for your exact configuration before ordering.
What else is worth upgrading while building my 10/22?
Our Viton stainless recoil buffers, trigger-assembly pin and buffer combo, and stainless V-block screws are practical small-part options. We also carry KIDD single-stage triggers, TandemKross Manticore triggers, Volquartsen parts, optics and scope mounts.
Pete's Pillars carries Green Mountain barrels alongside carefully selected Ruger 10/22 upgrades.
Small Change. Big Impact. Pete's Pillars.
| Brand | Green Mountain |
| Gun Platform | 10/22 |
| Muzzle | Target Crown |
| Type | Barrel |
| Barrel Length | 20" |
| Barrel Twist | 1:16 |