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  4. DTT Customs AR-15 Builder Set Featuring An Aero Precision M4E1 Upper And A Spirit of '76 Lower Receiver, Lakota Ops 4" M-Lok, Dust Door, and Forward Assist (Unassembled)

DTT Customs AR-15 Builder Set Featuring An Aero Precision M4E1 Upper And A Spirit of '76 Lower Receiver, Lakota Ops 4" M-Lok, Dust Door, and Forward Assist (Unassembled)

Part Number: S-CO-60240
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On sale $509.99 $264.99
Retail Price:$509.99
Your Savings:$245.00(48%)
1 left In Stock!
Availability: In Stock
Firearm Purchase Guide

DTT Customs AR-15 Builder Set Featuring 

An Aero Precision M4E1 Upper And A Spirit of '76 Lower Receiver, 

Premium Lakota Ops 4" M-Lok Handguard, 

Dust Door, and Forward Assist 


Aero Precision M4E1 Threaded Stripped Upper Receiver Anodized Black. The M4E1 Threaded Upper Receiver Features A New Angular Machined Design That Helps It Stand Apart From Standard Mil-Spec Upper Receivers. This Upper Receiver Features The Same Enhanced Body Profile As Our M4E1 Enhanced Upper Receiver But Is Threaded To Accept A Standard AR15 Barrel Nut. It Is Forged From 7075-T6 Aluminum And Precision Machined To Work With All Mil-Spec AR15 Parts.

These Lowers Are Made For The Spirit Of 76 Using Only The Best US Made Forgings Available. So Many Domestic AR Manufacturers Are Now Using Foreign Sourced Forgings That Often Have Soft Spots In Them. Combined With A Hard-Coat Anodized Mil 8625 Type 3 Class 2 - Matte Black Finish And The Extra Features And You Have A Really Top Class Product! The Pictures Are A Little Lighter Than The Actual Jet Black Finish To Allow For Better Viewing Of The Markings And Will Match The Color On A Quality Upper.

No More Marring Of The Receiver When Putting In The Bolt Stop, As It Is Held In Place By An Easy To Install Screw Instead Of A Roll Pin. Uppers And Lowers Will Fit Together As Tight As You Would Like, With The Built-In Nylon Tipped Upper Receiver Tensioning Screw That Will Let You Control The Fit. And The Rear Takedown Pin Is Held In Place By A Set Screw, So No More Crushed Detent Springs Or Lost Springs If You Change Out The Endplate. 

The Musket-15 Lower Will Take Any Industry-Standard Lower Parts Kit Or Drop-In Trigger. It Can Be Built Into Either A Rifle Or A Pistol (Following Local Laws Of Course) And Will Mate Up With Any Industry-Standard Upper Receiver, Either With Or Without A Forward Assist.

This Upper Features A Premium 4" Lakota Ops ACE Series M-Lok Handguard. This Handguard Is Made From The Highest Grade 6061-T6 Aluminum And Is Reinforced With Class 2 Type III Black Hard Anodizing. With M-Lok Cutouts On The Sides, This USA Made Handguard Will Allow You To Mount A Variety Of Accessories.


Lower: Spirit of '76 'We The People' Musket-15 AR-15 Serialized Stripped Lower Receiver
Shipping to FFL Dealer Required: Yes 
Lower Material: 7075-T6 Forged Aluminum 
Upper: Aero Precision M4E1 Threaded Stripped Upper Receiver Anodized Black
Handguard: Lakota Ops Premium ACE Series 4" M-Lok Handguard
Forward Assist: Omega Mfg. Forward Assist Assembly
Ejection Port Door: Omega Mfg. LR-308 Ejection Port Door, Rod And Spring

Please note: If the listing says "In-Stock" it means we have all of the items in stock. Our assembled upper receivers are made to order, please check this LINK to view our most up to date shipping status.

Important FFL Requirements: This item is a FFL restricted shipping product. You must arrange shipment of this product to a qualified FFL dealer.

Serialized products are subject to a non-refundable $4.00 handling fee.

If you would like to have your order processed faster, please see our HOW TO: Purchasing Serialized Parts. 

If you are unsure if we can ship to you, please view our Warranty, Returns, Terms and Conditions to see restrictions.

All Receivers Are Shipped As Long Arms To The State Of California, 21 Years Of Age Required As Well

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