Aero Precision

All parts in the Fix-It kit are compatible with AR15, M4E1 and M5 builds

Includes:

• Takedown Pin Detent (4)
• Takedown Pin Spring (4)
• Bolt Catch Roll Pin (2)
• Trigger/Hammer Pin (2)
• Safety Selector Spring (2)
• Safety Selector Detent (2)
• Buffer Retainer (2)
• Buffer Retainer Spring (2)
• Disconnector Spring (2)
• 4-40 Set Screw (for threaded takedown pin detent hole) (2)

Aero Precision lowers are precision machined to mil-spec dimensions, and work with standard AR15 components to ensure the highest quality with a correct component interface.

Gen 2 Features

• 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. This provides a tight fit with any standard AR15 upper receiver.
• Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look.

• Mil-Spec 7075-T6 Aluminum Buffer Tube, 6-position
• .308 carbine buffer
• .308 buffer spring
• End plate and lock nut
• Made in the USA

*STOCK NOT INCLUDED*

This lower parts kit does not include the fire control group, pistol grip or trigger guard.

Includes:

• Takedown/pivot Spring
• Takedown/pivot detent
• Takedown pin
• Pivot pin
• Bolt Catch
• Bolt Catch Spring
• Bolt Catch buffer
• Bolt catch roll pin
• Safety Selector
• Safety Selector spring
• Safety Selector detent
• 4-40 Set Screw (for threaded takedown pin detent hole)
• Buffer retainer
• Buffer retainer spring
• Magazine catch body
• Magazine catch spring
• Magazine catch button

The Aero Precision M4E1 Lower Receiver delivers billet aesthetics in a forged package. This custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades this custom engineered design provides that challenge much more expensive billet options, we have added several functional features to the lower receiver to simplify the assembly process for the at home builder.

M4E1 Lower Receiver Improvements:

• Threaded Bolt Catch Roll Pin - Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16" Hex Key required for assembly.
• Integrated Trigger Guard - Eliminates the possibility of breaking the trigger guard tabs by integrating the trigger guard into the lower, creating a stronger more rigid platform to build upon.
• Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
• Threaded Takedown Pin Detent Recess - Allows user to easily install the Takedown Pin detent and spring with the use of a 4-40 set screw (no more launching detents across the room).
• Increased Magwell Flare - Increased the flare of the magwell to aid in quick and efficient magazine changes.
• Marked and milled to accept short-throw safety selectors, but will work with standard selectors as well.

Includes:

• Stripped M4E1 Lower Receiver
• Nylon tipped tensioning set screw
• Threaded 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.

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 for use in AR15 carbines with a collapsible buttstock. Perfect for your build or direct replacement for worn out parts. Made in the USA.

Includes:

• Takedown/pivot Spring
• Takedown/pivot detent
• Trigger/hammer pin
• Takedown pin
• Pivot pin
• Bolt Catch
• Bolt Catch Spring
• Bolt Catch buffer
• Bolt catch roll pin
• Safety Selector
• Safety Selector spring
• Safety Selector detent
• 4-40 Set Screw (for threaded takedown pin detent hole)
• Buffer retainer
• Buffer retainer spring
• Trigger guard
• Trigger guard roll pin
• A2 pistol grip
• Pistol grip screw
• Pistol grip lock washer
• Trigger spring
• Hammer spring
• Disconnector spring
• Magazine catch body
• Magazine catch spring
• Magazine catch button
• Hammer
• Trigger
• Disconnector

• Used behind flash hider on your AR15
• Phosphate coated
• 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.