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Our amazing offer consists of a great variety of AR-10, AR-15, and pistol parts and accessories. Purchase upper receivers, muzzle devices, handguards, BCG, barrels, triggers, magazine extensions, etc., and start modifying your firearm today.

Killer Innovations Sancer 9mm Threaded Barrel for Glock 17 Gen 1-4

$139.92 - $139.92

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Firearm parts

Rainier Arms is the best place to purchase parts and accessories for your rifle or pistol online, and all that for more than affordable prices. Look no further, you can find here everything that comes to your mind and more! The best manufacturers in the business, like Killer Innovations, Lantac, Next Level Armament, Rainier Arms LLC, Apex Tactical Specialties, and many more are here to offer you their high-quality products. Select your preferred part and make your AR-10, AR-15 or pistol a unique piece of firearm.

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Model Glock 17 Remove This Item
Finish Molecular Dense Coating (MDC) Remove This Item
Price $100.00 - $199.99 Remove This Item
Configuration G17 Remove This Item
Manufacturer Killer Innovations Remove This Item

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What are the most common barrel thread patterns for pistols and rifles?

For .22LR, .22MAG, .17HMR, 9mm, and .223/5.56 NATO the most common thread pattern would be 1/2x28, with some exceptions for 9mm and .223/5.56 NATO firearms. As for .308/7.62mm and .338 Lapua Magnum, the thread pattern that is most commonly used is 5/8x24, with a few exceptions. Another typical thread pattern is 9/16x24 and it is mostly used for .40 S&W weapons.

Single triggers or two-stage triggers?

Whichever you choose, you cannot go wrong. The single trigger is fast and simple to use; as soon as you apply a small amount of pressure, the firearm goes off. Two-stage trigger is extremely accurate and you know precisely when the shot is going to be fired. The first stage prepares you for the second one, when the trigger pushes the hammer up causing the firearm to discharge. So, it is up to you to make a choice.

07/12/25

Sean R.

Love it, perfect quality, looks

Love it, perfect quality, looks awesome!

On Norsso Reptile XP RMR Slide For Glock 19 Gen 5 - Black DLC

Adam U.

07/11/25

Defective JMAC Threaded Mount – Manufacturing Flaw on First Thread

I recently purchased a brand-new JMAC mount from Rainier Arms and ran into a serious issue straight out of the package. When attempting to thread my Resilient RS9 suppressor onto the mount, I immediately noticed significant resistance. My first concern was potential cross-threading or an incorrect thread spec, but after double-checking compatibili...Read More

ty and verifying that the threads were properly aligned, the problem persisted.

Upon closer inspection with a pick, I discovered that the resistance was coming from the very first thread. There's a small but clearly visible dent or deformity in that area—deep enough that even after a careful attempt to smooth it out, the defect remains. This is not a burr or damage from improper handling; the mount was installed using proper tools, and the threads were never touched until I attempted to mount the suppressor.

Frankly, I’m extremely disappointed. For a premium product at this price point, JMAC’s quality control should be far better. This kind of defect should never make it out the door.

I’ve reached out to JMAC directly and hope they will stand behind their product and provide a timely resolution—ideally a replacement. I doubt Rainier Arms will assist, as they're just the dealer, but I expect JMAC to take responsibility. Read Less

On JMAC Customs 360HD 1/2-28 FaceMount HUB

Justin S.

07/09/25

UN Finally does something right

Super nice format and layout, great products, good info!

On UN12 Magazine - Issue 18

Steven R.

Loose mag fit on 5. 7 builds

If you build a 5. 7 be prepared for a VERY loose fitting magazine. I cured that with a cut off brass machine screw I threaded into a drilled and tapped hole in the front edge of the mag. Now she's tight. RANIER had the best price and picked up the ball when USPS lost my package (again, bastards), Someone will own a fine custom gun soon. Wish I cou...Read More

ld post pics. Read Less

On Sharps Bros Hellbreaker AR-15 Lower Receiver - Gen 2

Beau W.

A Functional Flash Suppressor

You can't even see a flash from the shooter's perspective firing at dusk through a . 357 lever gun. , and it's a rosebud to anyone else. I like it a lot.

On Next Level Armament 9mm Hi-Helix Flash Hider

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Firearm parts

What are the most common barrel thread patterns for pistols and rifles?

Single triggers or two-stage triggers?

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Product matches

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Manufacturers

Popular Categories

Blog posts

Parts

Firearm parts

What are the most common barrel thread patterns for pistols and rifles?

Single triggers or two-stage triggers?

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