Primary Weapons Systems is a federally-licensed firearms manufacturer in Boise, Idaho (est. 2007). They produce AR-15 (MK1) and AR-10 (MK2) rifles, uppers, muzzle devices, suppressors, handguards, and buffer systems using in-house CNC machining.

What is the difference between the MK1 MOD 1-M and MOD 2-M?

MOD 1-M has a KeyMod (PicMod) handguard. MOD 2-M has M-LOK and a fully ambidextrous lower. Both use the PWS long-stroke piston with a 3-setting adjustable gas regulator.

How do I identify my PWS model?

MOD 0: quad-rail (pre-mid-2015). MOD 1: KeyMod with forward assist. MOD 1-P: updated KeyMod (2016). MOD 2-M: M-LOK with ambi controls. Model and serial are on the lower receiver.

What calibers does PWS offer?

MK1: .223 Wylde, .300 BLK, 7.62x39. MK2: .308 Win / 7.62 NATO, 6.5 Creedmoor. PCC: 9mm.

What does the PWS long-stroke piston system do?

It cycles the bolt carrier via a full-length operating rod and gas piston, keeping carbon and heat out of the receiver. The 3-setting gas regulator supports standard, suppressed, and adverse-condition use.

What buffer weight should I use with a PWS upper?

H2 buffers are recommended. A standard carbine buffer can cause over-gassing. Use the H2 Enhanced Buffer (4.4 oz) for standard use or H2 Suppressor Weight Buffer (4.5 oz) for suppressed fire.

What is the difference between PWS buffer tubes?

Enhanced Buffer Tube: 6-position for stocks or braces. Pistol Buffer Tube: fixed-length for AR pistols. Modified Enhanced Buffer Tube: Law Tactical folding adapter compatible. All include the Ratchet Lock Castle Nut and Endplate Set.

A 1/2x28 flash suppressing compensator for .223/5.56 that reduces both muzzle flash and rise. BATFE has confirmed it is not a suppressor.

Does PWS make muzzle devices for AK and HK rifles?

Yes. FSC47 MOD 2 and JTAC47 are 14x1 LH for AK-47. FSC HK is 15x1 for HK91/G3. CQB74 is 24x1.5mm for .308 HK platforms.

What suppressors does PWS make?

BDE 22 (.22 LR), BDE 556 (5.56), BDE 9 (9mm), BDE 762 (.308/7.62), BDE 338 (.338/8.6), BDE 45 (.45). All modular and serviceable. NFA - Form 4 and $200 tax stamp required.

What is the T3 Summit?

A straight-pull biathlon toggle bolt action for Ruger 10/22-compatible platforms in .22 LR. Available as a complete rifle or bare action with P3 extended magazine release.

Does PWS offer LE or military discounts?

Yes. Use the contact form at primaryweapons.com/contact and select LE/MIL Discount as the subject.

How do I find an authorized PWS dealer?

Use the dealer locator at primaryweapons.com/locator/partnership/dealerlist. To become a dealer visit primaryweapons.com/locator/partnership/index.

Where are PWS product manuals?

Available at primaryweapons.com/pws-manuals. Contact customer service to request a hard copy.

How do I submit a warranty or RMA?

Submit at primaryweapons.com/warrantyrequest. Warranty info at primaryweapons.com/pws-warranty.

What is the expected barrel life of a PWS rifle?

.223 Wylde: 20,000-30,000 rounds. .300 BLK: 15,000-20,000. 7.62x39: 10,000-15,000. Varies with suppressor use, maintenance, and ammo.

Primary Weapons Systems premium components and parts are designed and manufactured in Boise, Idaho. After all, PWS rifles aren't just sub-MOA accurate... they are feature-rich with advanced small parts that contribute to the overall higher quality and innovation over the norm. Parts like suppressor compatible compensators and corresponding suppressor mounts, enhanced buffer systems, and the PWS ratchet lock castle nut and end plate.

Parts

All (58)

AR Upper Parts (35)

AR Lower Parts (7)

UXR Parts (6)

Suppressor Parts (19)

Sold out

MK109 MOD 1-M Upper .300 BLK

(1)

The MK109 MOD 1-M Pistol is equipped with the renowned PWS PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float MLOK handguard, forward assist controls, and a design closer to...

Rating: (1)

MSRP:

$1,209.95

Out of stock

Compare

Out of stock
Sold out

MK111 MOD 2-M Upper .223 Wylde

The MK111 MOD 2-M Upper operates on the highly acclaimed PWS Long Stroke Piston System, renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow, ensuring optimal performance...

Rating:

MSRP:

$1,499.95

Out of stock

Compare

Out of stock
Sold out

FRC 2-port 308 Compensator Flat - (5/8-24)

Elevate your shooting experience with the cutting-edge PWS FRC square shoulder compensator, designed to be a suppressor host for the Rearden Atlas suppressor mounting system, accommodating popular suppressors like the BDE 762. Crafted with precision...

Rating:

MSRP:

$99.95

Out of stock

Compare

Out of stock
FRC 3-port 308 Compensator Flat - (5/8-24)

Elevate your shooting experience with the cutting-edge PWS 3-port FRC square shoulder compensator, serving as a suppressor host for the Rearden Atlas suppressor mounting system—compatible with popular suppressors like the BDE 762. Crafted with...

Rating:

MSRP:

$99.95

Buy Now The item has been added

Compare

Buy Now The item has been added
MK116 MOD 2-M Upper 7.62x39

(1)

The MK116 MOD 2-M Upper operates on the highly acclaimed PWS Long Stroke Piston System, renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow, ensuring optimal performance...

Rating: (1)

MSRP:

$1,499.95

Buy Now The item has been added

Compare

Buy Now The item has been added
Sold out

MK114 MOD 2-M Upper .223 Wylde (NO COMPENSATOR)

(1)

The MK114 MOD 2-M Upper operates on the highly acclaimed PWS Long Stroke Piston System, renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow, ensuring optimal performance...

Rating: (1)

MSRP:

$1,499.95

Out of stock

Compare

Out of stock
Sold out

MK114 MOD 2-M Upper (Pinned) .223 Wylde

The MK114 MOD 2-M Upper operates on the highly acclaimed PWS Long Stroke Piston System, renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow, ensuring optimal performance...

Rating:

MSRP:

$1,499.95

Out of stock

Compare

Out of stock
Sold out

Enhanced Steel Body Buffer, Carbine, H3, 5.1 oz.

(1)

MOD 2 4140 Steel Body Buffers have a unique fluted design with minimum contact points, allowing debris to clear easily, while the FNC LIFE HD treatment chemically bonds in lubrication for smoother cycling. H3 Weight: 5.1 oz Nearly an ounce heavier, the...

Rating: (1)

MSRP:

$69.95

Out of stock

Compare

Out of stock
MK116 MOD 2-M Upper .223 Wylde

The MK116 MOD 2-M Upper operates on the highly acclaimed PWS Long Stroke Piston System, renowned for its reliability and reduced fouling. The inclusion of a 3-setting Adjustable Gas System allows users to fine-tune gas flow, ensuring optimal performance...

Rating:

MSRP:

$1,499.95

Buy Now The item has been added

Compare

Buy Now The item has been added
sale

FSC Compensator- 556 (1/2x28)

The patented FSC compensator was designed to be an effective compensator for shooters in all situations. Offering recoil reduction as a primary function, and flash suppression as a secondary function, the FSC is one of the most popular PWS compensators...

Rating:

MSRP:

$99.95

$49.99

Buy Now The item has been added

Compare

Buy Now The item has been added
Sold out

MK1 MOD 2-M PicLok Replacement Rail- 107

The MK1 MOD 2-M Replacement rail is for owners of PWS MK1 MOD 2 owners to replace their current PicMod rail with PicLok. Includes mounting hardware and instructions. Please note, these handguards will not work on DI uppers, and are proprietary to the PWS...

Rating:

MSRP:

$174.95

Out of stock

Compare

Out of stock
MK118 MOD 2-M Upper 6MM ARC

The MK118 MOD 2-M Upper delivers unmatched precision and versatility, now chambered in the highly efficient 6MM ARC. Designed to provide flat trajectories, reduced recoil, and exceptional energy retention, this upper is perfect for precision shooters,...

Rating:

MSRP:

$1,499.95

Buy Now The item has been added

Compare

Buy Now The item has been added
MK109 MOD 1-M Upper, 300BLK, Kodiak Brown

The MK109 MOD 1-M Pistol is equipped with the renowned PWS PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float MLOK handguard, forward assist controls, and a design closer to...

Rating:

MSRP:

$1,209.95

Buy Now The item has been added

Compare

Buy Now The item has been added
Sold out

MK114 MOD 1-M Upper 6MM ARC

The MK114 MOD 1 Upper delivers unmatched precision and versatility, now chambered in the highly efficient 6MM ARC. Designed to provide flat trajectories, reduced recoil, and exceptional energy retention, this upper is perfect for precision shooters,...

Rating:

MSRP:

$1,209.95

Out of stock

Compare

Out of stock
Sold out

MK114 MOD 1-M Upper .223 Wylde

The MK114 MOD 1-M Upper is equipped with the renowned PWS PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float MLOK handguard, forward assist controls, and a design closer to...

Rating:

MSRP:

$1,209.95

Out of stock

Compare

Out of stock
Sold out

Bolt Spring

Mk1 Bolt Spring - Per Single Spring

Rating:

MSRP:

$1.00

Out of stock

Compare

Out of stock