KelTec R50 Rifle 5.7x28mm Black Folding Stock

The KelTec R50 is a semi-automatic carbine chambered in 5.7x28mm, built for shooters who demand high-capacity, low-recoil performance in a compact package. This keltec r50 rifle 5.7x28mm black folding stock ships with a side-folding stock that tucks to either side of the grip, a threaded muzzle for suppressors or compensators, and a full-length Picatinny top rail for optics. The rifle weighs just over 4.5 lbs unloaded, making it one of the lightest semi-auto rifles in its class. Per KelTec specs, the R50 uses a direct-blowback action and ships with adjustable utility sights and ambidextrous controls.

Manufacturer	KelTec
Model	R50
Material	Synthetic polymer stock, blued steel barrel
Compatibility	5.7x28mm ammunition (FN 5.7x28mm SS190, SS197SR, etc.)
Finish	Blued/black metal, black synthetic stock
Weight	4.6 lbs (unloaded, per manufacturer specs)
Condition	New

Key Features

• Side-Folding Stock — Locks to either side of the grip for compact storage and transport without removing optics. Lets you stow the rifle in a backpack or vehicle case.
• Threaded Muzzle (1/2×28) — Accepts standard 5.56mm suppressors, flash hiders, or compensators. Reduces muzzle rise and sound signature for tactical applications.
• Full-Length Picatinny Rail — Continuous top rail from receiver to handguard. Mount red dots, LPVOs, or night vision without adapter plates.
• Ambidextrous Controls — Reversible magazine release and charging handle for left- or right-handed shooters. No training scars under stress.
• Adjustable Utility Sights — Tool-less elevation and windage adjustments. Ready out of the box for zeroing at 50 or 100 meters.

Who It’s For

Law enforcement officers needing a low-recoil patrol carbine for vehicle or close-quarters use. Military personnel looking for a lightweight backup rifle for aircrew or support roles. Serious shooters who want a 5.7x28mm platform for training, competition, or home defense without the weight of a full-size AR.

Pros / Cons

• Pro: Sub-5-pound weight with folding stock — one of the lightest 5.7x28mm rifles on the market.
• Pro: Direct-blowback action is simple to clean and maintain with minimal parts.
• Pro: Ambidextrous controls make it suitable for both dominant-hand shooters.
• Con: Magazine capacity is limited to 10 rounds (standard) or 20 rounds (optional) — not as high as some AR-pattern 5.7 rifles.

Comparison vs. Competitors

Feature	KelTec R50	Ruger LC Carbine (5.7x28mm)	PSA Rock 5.7 Pistol (with brace)
Weight	4.6 lbs	5.3 lbs	4.2 lbs (pistol only)
Stock	Side-folding	Fixed synthetic	Brace (pistol)
Rail Length	Full-length Picatinny	Partial top rail	None (requires adapter)
MSRP	$735.54	$799.00	$599.00 (pistol)
Ambidextrous	Yes	No	No

FAQ

What type of 5.7x28mm ammo does the KelTec R50 use?

The R50 cycles all standard 5.7x28mm loads, including SS197SR, SS195LF, and SS190 (where legal). Use high-quality factory ammo for reliable function. Avoid reloads or underpowered rounds.

Does the KelTec R50 come with a manual safety?

Yes. The R50 includes a manual thumb safety located above the grip on both sides (ambidextrous). It is a two-position safety: safe and fire. The safety blocks the trigger sear.

Can I mount a suppressor on the threaded barrel?

Yes. The barrel is threaded 1/2×28, the same as most 5.56mm AR barrels. Use a direct-thread or QD suppressor rated for 5.7x28mm. Note that subsonic 5.7x28mm is rare; most loads will be supersonic.

Is the KelTec R50 legal in my state?

Check your local laws. The R50 is a semi-automatic rifle with a folding stock. Some states (e.g., CA, NY, MA, CT) have restrictions on folding stocks, magazine capacity, or overall rifle length. The R50 ships with a 10-round magazine compliant with most states. Verify with your local laws before ordering.

Trust & Delivery

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

Browse more options in our Semi Auto Rifles collection, or check our 5.7x28mm Ammunition and Rifle Accessories categories.

Last updated: April 2026