Aero Precision

• Mil-Spec 7075-T6 Aluminum Buffer Tube, 6-position
• Carbine buffer
• Buffer spring
• End plate and lock nut
• Made in the USA
• Stock Not Included

The AR15/M4E1 Field Repair Kit features common parts that may rattle loose or break. Carry one in your range bag and always have what you need to get your rifle up and running again!

Includes:

• AR15 Takedown Pin Detent (2)
• Takedown Pin Spring (2)
• Roll Pin, Fwd Assist (2)
• Bolt Catch Spring (2)
• Bolt Catch Buffer
• Bolt Catch Roll Pin (2)
• Trigger/Hammer Pin
• Safety Selector Spring
• Safety Selector Detent
• Buffer Retainer
• Buffer Retainer Spring (2)
• Trigger Guard Roll Pin (2)
• Pistol Grip Screw
• Pistol Grip Lock Washer
• Trigger Spring
• Hammer Spring
• Disconnector Spring
• Nylon Tipped Tension Set Screw - 1/4-28 x 1/2
• 4-40 Set Screw (for threaded takedown pin detent hole) (2)
• Threaded Roll Pin
• M4E1 Lower Bolt Catch Pin

Aero Precision Mil-Spec carbine buffer spring for use in AR15 carbines with a collapsible buttstock. Perfect for your new build or as a direct replacement for worn out parts. Made in the USA.

Aero's Low Profile .750 Gas Block is constructed from 4150 hardened steel with steel set screws which are 10-32 x 3/16 knurled cup point. *Note: Roll pin is not included. No Logo.

Markings include: Property of USA, MOD M16A4, CAL. 5.56MM and has Safe/Semi/Burst safety selector markings

Includes:

• M4E1 Stripped Lower Receiver - Anodized Black
• A2 Grip - Black
• Mil-spec Lower Parts Kit
• AR15 Carbine Receiver Extension
• AR15 Carbine Buffer and Spring
• These parts are installed

M4E1 Receiver

M4 Stock and A2 Grip

Mil-Spec Lower Parts Kit

Carbine Receiver Extension

AR15 Carbine Buffer & Spring

Must ship to a U.S. FFL dealer

The Aero Precision M4E1 Complete Lower Receiver with Magpul SL Carbine Stock is the perfect upgrade for your AR build. This complete lower features an M4E1 Lower and is upgraded to include an Magpul PRS Lite Stock. The MOE SL® Stock – Mil-Spec Model (MOE Slim Line) is a drop-in replacement buttstock for AR15/M4 carbines using mil-spec sized receiver extension tubes. Designed for the modern battlefield, the sleek profile, dual-side release latches, rolled toe, and angled rubber butt-pad are optimized for use with body armor or modular gear and provides for efficient shoulder transitions.

INCLUDES:

• M4E1 Lower Receiver
• Magpul MOE Grip
• Magpul SL Carbine Stock
• Lower Parts Kit
• Carbine Receiver Extension
• Enhanced Carbine Buffer Tube (Kodiak Brown & OD Green Anodized)
• AR15 Carbine Buffer and Spring
• These parts are installed

This complete upper includes the new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

Barrel is 5.56 NATO chambering, 16" 1/7 twist, gas port drilled. Carbine Length gas system, M4 feed ramp and a standard A2 flash hider.

Also included is the Black Nitrided Bolt Carrier Group & AR15 Breach Ambi charging handle.

This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

INCLUDES:

• M4E1 Threaded Assembled Upper Receiver
• 15" M-LOK ATLAS R-ONE Handguard of choice
• 16" .223 Wylde Stainless Steel QPQ Barrel, Mid-Length
• Low Profile Gas Block and Mid-Length Gas Tube
• A2 Flash Hider
• Product comes assembled
• This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab

M4E1 THREADED UPPER RECEIVER FEATURES:

• New enhanced forging that gives the upper receiver a "billet look"
• New picatinny profile that blends seamlessly with our Enhanced Series Handguards
• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• Includes port door and forward assist installed

ATLAS S-ONE HANDGUARD FEATURES:

• Front and rear picatinny rail
• Eliminated center of top rail for weight reduction
• Indexing grooves in 12:00 position for positive grip control
• Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• Compatible with low profile gas blocks
• 1.3" Inside diameter
• 1.5" Outside diameter
• Compatible with mil-spec AR15 upper receivers and barrels
• Learn More about our NEW ATLAS Handguards

16" .223 WYLDE STAINLESS STEEL QPQ BARREL, MID-LENGTH FEATURES:

• .223 Wylde 16" Mid Length Barrel, 1/8 Twist
• QPQ Corrosion Resistant Finish
• .750 gas block journal
• Mid length gas system
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider

This complete upper receiver incudes an HBAR profile barrel that is laser marked "HBAR".

INCLUDES:

• M4E1 Threaded Assembled Upper Receiver
• 15" ATLAS S-ONE M-LOK Handguard
• 16" 5.56 HBAR barrel
• Low Profile Gas Block and Mid-Length Gas Tube
• Product comes assembled
• This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab.

M4E1 THREADED UPPER FEATURES:

• New enhanced forging that gives the upper receiver a "billet look"
• New picatinny profile that blends seamlessly with our Enhanced Series Handguards
• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• Includes port door and forward assist installed

ATLAS S-ONE HANDGUARD FEATURES:

• Front and rear picatinny rail
• Eliminated center of top rail for weight reduction
• Indexing grooves in 12:00 position for positive grip control
• Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• 1.3" Inside diameter
• 1.5" Outside diameter
• Compatible with mil-spec AR15 upper receivers and barrels
• MLOK attachment points

16" 5.56 HBAR BARREL

• 5.56 Nato 16" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
• .750 gas block journal
• Mid-Length Gas System
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider

Includes:

• M5 (.308) Lower Receiver
• Magpul MOE Grip
• No Stock
• Lower Parts Kit
• M5 Carbine Buffer and Spring
• These parts are installed

Our M5 .308 Stripped Lower Receiver helps you build a big-bore AR from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface. DPMS cut.

Features:

• Works with standard AR 308 components and magazines
• Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver.
• Rear takedown pin detent hole is threaded for a 4-40 set screw
• Bolt catch is threaded for a screw pin (no roll pin needed)
• Integrated trigger guard
• Selector markings will work with 45, 60 or 90 degree safety selectors
• Accepts Battle Arms Development short throw safety selectors, but will work with any standard selector
• No gap with aftermarket pistol grips

Includes:

• Stripped M5 (.308) Lower Receiver in Anodized Black
• Nylon tipped tensioning set screw

• Ultralight 1" Extended Scope Mount features a rear ring that is pushed forward 1", resulting in better eye relief
• Designed for AR type Upper Receivers
• Fits Mil-Spec 1913 Picatinny Rails
• Cross-Slot Keyway
• 6061-T6 Aluminum Construction
• Black Hard Coat Anodized
• Free from unnecessary bulk, providing one of the lightest mounts in the industry