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.

Parts - AR Lower Parts - Primary Weapons Systems

AR Lower Parts

All (13)

Buffer Tubes and Buffers (12)

A5 Buffer System (2)

Accessories (6)

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TriggerTech Adaptable 2-Stage Trigger

Compatible with PWS MK1/MK2/UXR rifles as well as most AR-15/AR-10 receivers, this TriggerTech Adaptable Trigger is built to offer top competitive shooters the most accurate and dependable trigger on...

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$150.00

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PWS MagBlock

Remember, nobody outranks safety! The PWS Magblock was designed to be a hi-viz empty chamber designator, capable of being inserted into an AR15 patterned magwell to show the status of a rifle. The...

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$15.00

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PWS Enhanced AR-15/AR-10 Pistol Grip

The PWS Enhanced AR-15/AR-10 Pistol Grip is designed to enhance the interface between the shooter and the weapon platform. The vertical angle of the grip and the enhanced beavertail allow for a...

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$9.99

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Enhanced A5 Body Buffer, 5.35 oz

Enhanced A5 Buffer The Enhanced A5 Buffer is on of the most beneficial upgrades to the AR platform. When used in conjuction with an A5 length buffer tube, the A5 buffer increased rel

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$74.99

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MilSpec Safety Selector

Standard MilSpec Safety Selector

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$9.95

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Enhanced Pistol Buffer Tube with Ratchet Lock Castlenut and Endplate

Introducing the PWS Enhanced Pistol Buffer Tube with Ratchet Lock Castle Nut & Endplate—designed for optimal performance and ease of use. Weighing in at just 4.3 oz, this buffer tube is constructed...

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PWS Mod 2 Bolt Catch

The PWS Mod 2 Bolt catch features an enlarged surface area on the top and bottom portion of the paddle to increase dexterity when manipulating the bolt by locking it to the rear or releasing the bolt...

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$29.99

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Enhanced Steel Body Buffer, Carbine, H4, 6.8 oz.

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...

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$189.95

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Enhanced Steel Body Buffer, Carbine, H2 (.308 Short), 4.1 oz.

Weight- 4.1 oz. Used for .308 applications and ships with all MK2 series complete lowers and rifles. Shortened to work with AR-10 platforms using standard buffer tubes

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$119.95

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Enhanced A5 Buffer Tube with Enhanced A5 Buffer and Spring

Enhanced A5 Buffer Tube The PWS Enhanced A5 Buffer Tube is constructed from impact extruded 7075 aluminum, delivering exceptional strength while maintaining a mil-spec tube diameter for compatibility...

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$169.99

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Ratchet Lock Castle Nut and Endplate Set

Introducing the PWS Ratchet Lock Castle Nut & Endplate Set—a secure, reliable solution for your firearm setup. Designed for ease of installation and rock-solid performance, this set eliminates the...

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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...

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Enhanced Steel Body Buffer, Carbine, H2, 4.4 oz.

(2)

The PWS Enhanced Steel Body Carbine H2 buffer is a standard weight, and ships with all MK1 complete lowers as well as rifles. The 4140 Steel Body Buffers have a unique fluted design with minimum...

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