The AR Stoner LR-308 A3 Upper Receiver Assembly chambered in 308 Winchester is ready to be assembled to a complete lower and fired! This LR-308 billet upper features a bolt carrier group, a SOCOM contour 20” barrel and an Ultralight 15” free float M-Lok handguard.
Securely mount popular accessories directly to the precision M-Lok cutouts. This sleek and ergonomic free float handguard meets shooters needs without sacrificing strength and performance. The AR-STONER LR-308 Upper is patterned after DPMS and will work with DPMS style parts/lowers.
The A3 upper assembly comes complete with charging handle, forward assist, ejection port cover, flash hider, bolt and bolt carrier assembly. Supplied without sights, this upper is a great platform for a precision scope or iron sights (both sold separately).

Features:
- Complete Bolt Carrier Group
- 15″ Ultralight M-Lok Handguard
- Fluted
- 20” Barrel
- 1:10 Twist
- Rifle-Length Gas System
- Flash Hider
Product Information AR STONER LR-308
Cartridge | 308 Winchester |
Finish | Matte |
Material | Aluminum |
Extra Features | Fluted |
Weight | 6.5 Pound |
Barrel Length | 20 Inches |
Twist | 1:10 Inches |
Threads | 5/8″-24 |
Barrel Contour | SOCOM |
Sights | No |
Barrel Finish | Stainless |
Chrome Lined | No |
Gas Block Diameter | 0.75 Inches |
Gas System Length | Rifle |
M4 Feed Ramps | Yes |
Upper Receiver Type | A3 Flat-Top |
Barrel Material | 416R Stainless Steel |
Handguard | 15″ M-LOK Ultralight |
Bolt Carrier Assembly Included | Yes |
Muzzle Device | Flash Hider |
Mil-Spec or Commercial | Commercial |
Country of Origin | United States of America |
Compatible With | AR-10, LR-308 |
Stone County Ar
Securely mount popular accessories directly to the precision M-Lok cutouts. This sleek and ergonomic free float handguard meets shooters needs without sacrificing strength and performance. The AR-STONER LR-308 Upper is patterned after DPMS and will work with DPMS style parts/lowers.
The A3 upper assembly comes complete with charging handle, forward assist, ejection port cover, flash hider, bolt and bolt carrier assembly. Supplied without sights, this upper is a great platform for a precision scope or iron sights (both sold separately).
FUN FACTOR– Airsoft is a hobby so airsoft guns must be able to generate joy. We look at recoil, sound, design, optional accessories, and overall awesomeness that make the gun interesting. Non-shooting models can also be fun, like a beautiful revolver with realistic ammo that you can load into a rotating cylinder. We rate each of our picks on how much pleasure you can derive from ownership.
REALISM – What makes Airsoft guns attractive for so many is that they replicate real guns. While many manufacturers try their best to recreate the details and feel of a real gun, some succeed while others fail horribly and end up with something more akin to a toy. We rate how real each of our top picks feels and looks.
Hot Stone Wynne Ar
PERFORMANCE – Power measured in feet-per-second (FPS), range and accuracy are the key metrics we use to determine the best airsoft gun. From there, we also prioritize airsoft guns with an adjustable hop-up and high-quality buckings to ensure that they give the consistency and accuracy you need. All FPS ratings are universally based on 0.2 gram BBs.
BUILD QUALITY – We look for good quality construction, materials and refinement not only in the external components but also internally. The fit tolerances, discernable wobbles and rattles, smoothness of operation, durability of components, etc are all considered.
VALUE – Affordably priced airsoft guns that rank highly in all the above categories are prioritized over more expensive airsoft guns that offer the same, as “bang for your buck” is an important consideration for most airsoft players.
This criteria rates if you are getting more for your money compared to similar guns in the same class, meaning is it a good deal. For more information on how to determine the value of an airsoft gun, check out this article on what goes into the cost of an airsoft gun.
Single point slings attach to a single point on the weapon. This allows for a robust and straightforward type of sling that is easy to use by anyone. The sling attaches to the rear of the firearm and typically features a loop that goes around the body over one arm and under the other. Single point slings are also an excellent choice for tactical shooting and do have some limited hunting applications.
Single point slings are very easy to use and allow you to don and remove your sling with minimal effort quickly. The sling always makes it very easy to manoeuvre the weapon, especially when it comes to indoor use.
Ar stone
Since the sling only attaches to the rear of the gun, the muzzle is entirely free and allows for transitioning from shoulder to shoulder smoothly enabling you to shoot around barriers. The single point sling offers the enormous range of movement for shooters of all three sling types. They are very simple and will not likely get tangled up in your gear as you move.
The main disadvantage of a single point sling is when you aren’t handling the weapon; a rifle with single point sling kind of just flops around which reduces the ability to have your hands free for doing other tasks. For male shooters in particular, this could result in some uncomfortable blows to your nether regions. Single point slings are the least ideal for prolonged use and are the hardest to climb with and difficult to get up and over an obstacle as the lack of control will result in your weapon bouncing off obstacles.
COLLECTABILITY– Sometimes an Airsoft gun stands out simply because it is unique either because it’s not produced by anyone else or holds enough of a cultural or collectable value to make you want to have a piece of history regardless of its utility.
This criteria rates whether the gun is a must-have for collectors. Some rare or limited edition Airsoft guns even appreciate in value in the secondary market and we rate their investment value where applicable.