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Pistol parts

Pistol parts and handgun parts on one place. Rainier Arms offers you a selection of pistol triggers, barrels, slides, magazines, frames and more from top manufacturers in the industry.

Grayguns Sig Sauer P320 X-Series Laser-Sculpted Grip Module - Compact

$130.00 - $180.00
Four Payments of $45.00 with . Learn More

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DPM Systems Technologies Mechanical Recoil Reduction System For Sig Sauer P320 Full Size (4.7" Barrel)
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Verified Reviewer

0.0 star rating

07/13/25

Review by Anonymous User

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07/13/25

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Sean R.
Verified Buyer

5.0 star rating

07/12/25

Love it, perfect quality, looks

Review by Sean R. on 12 Jul 2025 review stating Love it, perfect quality, looks
Love it, perfect quality, looks awesome!

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

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07/12/25

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Adam U.
Verified Buyer

1.0 star rating

07/11/25

Defective JMAC Threaded Mount – Manufacturing Flaw on First Thread

Review by Adam U. on 11 Jul 2025 review stating 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 compatibility 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.

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

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07/11/25

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Justin S.
Verified Buyer

5.0 star rating

07/09/25

UN Finally does something right

Review by Justin S. on 9 Jul 2025 review stating UN Finally does something right
Super nice format and layout, great products, good info!

On UN12 Magazine - Issue 18

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07/09/25

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Steven R.
Verified Buyer

5.0 star rating

07/09/25

Loose mag fit on 5. 7 builds

Review by Steven R. on 9 Jul 2025 review stating 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 could post pics.

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

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07/09/25

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Beau W.
Verified Buyer

5.0 star rating

07/09/25

A Functional Flash Suppressor

Review by Beau W. on 9 Jul 2025 review stating 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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07/09/25

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