Stag 15 SPR RH QPQ 18 in 5.56 Upper BLA SL NA

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Inspired by the legendary Mk 12 Special Purpose Rifle, Stag Arms set out to design a useful and versatile upper that offers today's AR-15 enthusiast all the utility of the Mk 12 in a modern package. Much like the original Special Purpose Rifle was designed for greater effective range than an M4 Carbine, the Stag SPR was designed to offer greater effective range over our shorter carbine and pistol offerings in the lightweight AR-15 platform without stepping up to the larger Stag 10. 

We started with a traditional 18" SPR profile barrel for reduced weight while maintaining rigidity and accuracy. Chambered in 5.56 NATO  with a 1/7 twist rate and a rifle-length gas system, allows the shooter to use a wide variety of projectiles including the Mk 262 77gr Open Tip Match round originally developed for the SPR program. We include a Stag mil-spec, Magnetic Particle Inspected M16 bolt and carrier group that is Salt Bath Nitride (QPQ) treated for longevity and ease of cleaning. The extra long, free float Stag 16.5" Slimline handguard allows for increased accuracy, completely covers the low profile gas block and allows the user to customize their configuration to fit the mission with multiple M-Lok slots.

 This upper half does not include a BCG or Charging Handle.


Weight: 5.5 lbs (est)

Length: 37.5" (est)

Action: Semi-Auto Direct Impingement

Caliber: 5.56 NATO (also shoots .223)

Barrel: 18", 4150 Steel, SPR Profile including OPS Inc collar, Black Nitride Coated (QPQ)

Twist Rate: 1/7 Button Rifled

Muzzle Device: A2 Flash Hider

Handguard: Stag 15 16.5" Slimline M-LOK Handguard

Upper/Lower Receiver Material: Forged and Mil-Spec 7075 T6 Aluminum with Type 3 Hard Coat Anodizing

Gas System: Rifle Length with Low Profile Gas Block

SKU: STAG15102602

This upper half does not include a BCG or Charging Handle.