ArmaLite SPR Model 1 AR-15

While shooting all of the free ammunition at the Media Day event in Las Vegas this year, I came across the ArmaLite SPR Model 1 AR-15 and ArmaLite engineer Nathan Brinkmeyer. Nathan showed me the ins and outs of their AR-15 platform.

ArmaLite SPR Model 1 AR-15 LB

Detachable Rails – One of the first things that jumps out at the casual observer are the detachable rails on the fore grip. Using an Allen wrench the shooter quickly remove the side or bottom rails and determine if they want the full Picatinny quad rail system or go modular. Rails can be replaced with full flat replacements or half flat/half Picatinny rails to the user’s choosing.

Continuous Optic Platform (COP) – The top rail is one piece and runs full length, with no gaps (end of fore grip to end of receiver). This allows scope or optics to be mounted in a very secure fashion.

Proprietary Barrel Nut – Nathan also pointed out ArmaLite’s proprietary large barrel nut that allows for quickly breaking the rifle down for cleaning and/or maintenance.

ArmaLite SPR Model 1 AR-15 CB

Two-stage match trigger – Nathan explained that these rifles have a 2-stage match trigger that usually ships from the factory with a 4.5 lb. trigger pull. I’m pretty sure that the one I shot at Media Day was a little less than that – very smooth, and very quick. ArmaLite’s triggers also reset very quickly, a nice feature for tactical or sport shooter applications alike. The trigger resets almost immediately after let off from trigger pull, and much sooner than some of the other AR-15 rifles I’ve shot.

Nathan said that there are 5, 10, 15, 20, 25 and 30 round magazines available for the rifle. This rifle handles well and I was able to hit standard steel targets at 100 yards with multiple rounds. I was pulling the trigger in less than a second from the previous shot and was easily able to maintain target acquisition.

Other features from ArmaLite include:

Caliber .223/5.56 X 45 mm NATO
Barrel Free Floated 16″ Double Lapped, Chrome LinedChrome Moly Vanadium MIL- B-11595-E, Threaded 1/2×28
Twist RH 1:7″ (69 – 80 Ammo Grain)
Muzzle Device Flash Suppressor
Front Sight Base Gas Block with Picatinny Rail Top of gas block is .293 (+/-) lower than top of upper receiver
Upper Receiver Forged Flattop with Picatinny Rail & Laser Engraved Rail Numbering, 7075-T6 Aluminum w/ 8″ Hand-guard
Lower Receiver 7075-T6 Aluminum (forged)
Trigger Tactical Two Stage, 1st Stage 3.5 lbs – 2nd Stage Approximately 5-6 lbs
Overall Length 35.5″ with stock extended (32″ collapsed)
Finish Anodized Aluminum Upper/Lower Receiver, Manganese Phosphated Steel Barrel
Accuracy 1.5 – 2.5 MOA
MSRP (Price) $1,529.00

Aaron is a life-long firearm enthusiast and hunter. He has been a police officer for nearly 19 years, and currently is a Sergeant in Special Operations. He has served on the department’s SWAT Team for 14 years, with 8 years as the Sniper Team Leader. When not fussing over fractions of inches, and gut-less wonders, he can usually be found sipping from a ridiculously large coffee mug. Aaron is also the editor and main writer at


  • Nathan
  • Rusty Ray

    So, what is the difference between a Marksman and a Sniper?

    Just wondered. Rusty

  • KP

    What’s with the grenade launcher cutouts?

    I think Manf.s should stop making these “government” profile barrels because the VAST majority of users will not be using it.

  • Griffin

    Detachable rails seem to have become THE hot thing for tactical rifles.

  • Sian

    @Rusty Ray
    Snipers are trained to work in 2-man units and have extensive training in fieldcraft and camouflage. Marksmen work within an infantry unit and have standard infantry training+advanced marksmanship.

  • William C.

    Hi Ray. These days marksman is often used to refer to a dedicated squad member trained in longer ranged shooting and carrying a full-length scoped rifle. In US forces at least the weapon used ranges from modified M16A4s to heavily upgraded M14s.

  • Cymond

    I think detachable rails are partially backlash against the tactical/tacti-cool/tacky-cool phase. It allows the owner to have accessories without covering the rifle with unnecessary rails. We want the ability to mount accessories without being called mall ninjas.

  • jdun1911


    There are a lot of handguards that allow rails to be place on or taken off. People by these kind of handguards to keep the weight down. It’s not about being untactical cool.

  • p1choco

    What triggers are they using?

  • Lance

    Yet again another M-4 update candidate.

  • Aaron

    20 years ago just about the only AR-15’s available were grotesquely large, military style rifles with fixed sights, no accessories and iron sights. Maybe you could rig a bi-pod.

    10 years ago we were starting into the carbines that had shorter barrels, some with adjustable stocks, and maybe a rail on top of the receiver.

    5 years ago we are full blown into the “mall ninja” mode with quad rails, fore grips, fully adjustable stocks, single point slings, lights, lasers, new caliber, and incredible holographic sights.

    Today we are seeing gas pistons, ergonomic grips, modular rail systems, rail systems made of lighter and more versatile materials, battery assist devices, charging handle extensions, bolt release lever extensions, even more calibers on the AR platform, and in some cases totally new colors.

    What’s my point? Thank God that the manufacturers are pouring out the “latest, greatest” AR-15 platforms for us who love them and want as many options that we choose from. I say the more the merrier. I don’t have to buy everything that comes out, but a little window shopping is fun and keeps me thinking about making mine better!


  • I like detachable rail sections. Just enough length to hold the light or optic right where I want it…without the added weight & ‘Cheese Grater’ look.