M4A1 BLOCK I

$2,699.99

Purchase
Made to Order
This rifle is chambered in 5.56 NATO.
Our uppers and lowers are forged from 7075-T611 aluminum.
This platform is built on a Proprietary high-grade Chrome Moly Vanadium steel barrel with a phosphate finish. All 5.56 NATO barrels are threaded with a 1/2X28 pitch.
Our 14.5's are pinned and welded to meet the 16" OAL (overall length) requirements. We also offer many options when it comes to suppressor ready muzzle devices. Please contact sales for all available options.
All of our Carriers go through a R.E.M Polish process prior to QPQ coating. The R.E.M Polish process reduces friction, improves part durability, improves oil retention, and improves contact & bending fatigue. Our Bolts are MPI (Magnetic Particle Inspected) and coated in a durable titanium nitride finish.
This model has been upgraded with an fully ambidextrous fire selector.
This rifle runs our TYPE-A PMC Two-Stage Trigger. Constructed from hardened S7 Tool steel this trigger is coated in QPQ to fight against friction and to ensure lubricity. The PMC Two-Stage Trigger ships at 1 1/2 reset to 3 1/2 trigger pull.

Quick Specs

CALIBER: 5.56 NATO
CLASSIFICATION: Rifle
BARREL LENGTH: 14.5″
HANDGUARD: Knights Armament
GAS SYSTEM: Non-Adjustable
GAS LENGTH: Carbine Length
TRIGGER: 2-Stage
MUZZLE: Customer’s Preference
BCG: QPQ W/R.E.M Polish
OVERALL LENGTH:
FIRE SELECTOR: Ambi-Short Throw Adjustable
WEIGHT:

 

Description

The M4A1 Block I also known as the M4A1 SOPMOD was a sister to the US Military’s M4 Carbine. The SOPMOD designation stands for Special Operations Peculiar Modifications and is an accessories system designed in the early 1990’s to customize the base M4 Carbine in-the-field with low-cost off-the-shelf components.  This would allow for each set up to be mission specific and allow for proper set mounting of optics, IR/VIS lights, verticals grips, etc.

This TYPE-A M4A1 Block I is built on an accurate Carbine platform with proven mil-spec components to make it an incredibly versatile rifle. The M4A1 Block I is equipped with a 14.5″ Cold Hammer Forged barrel with a TYPE-A ASR Ready Muzzle Brake or other muzzles for an additional cost.  Our M4A1 Block I is also equipped with a Knights Armament Quad & CAR 15 style furniture.  The TYPE-A M4A1 Block I Rifle is driven by our TYPE-A QPQ bolt carrier group w/R.E.M Polish. Equipped with a DGI (direct gas impingement) system and our new TYPE-A PMC Straight 2-stage trigger to give it consistent reliability time after time.

NOTE:  All of our rifles are Hardcoat Anodized and then Cerakoted to give you a longer lasting more durable finish.  We wanted your rifle to wear to the anodized surface vs. the raw aluminum surface like some of our competitors.  Just another added benefit making our rifles…TYPE-A.

****Please Note: All NFA rules apply. Please check with your local state laws.

Features

*(OPTICS NOT INCLUDED)

BARREL

  • Caliber: 5.56 NATO
  • Length: 14.5″ Cold Hammer Forged Mod Profile
  • Gas block: A2 Front Sight Post
  • Material: Proprietary high-grade Chrome Moly Vanadium steel
  • Gas System: Carbine Length
  • Twist Rate: 1:7 twist
  • Finish: Mag-Phos
  • Thread: 1/2×28
  • Muzzle Device: Options Available

UPPER RECEIVER

  • Platform:  GEN3 Precision Machined 7075-t6 Aluminum Upper Receiver with Extended Feed Ramps
  • Finish: Option
    • Black – MIL-A-8625, Type-III, Class 2
    • Color – Type-III Anodizing with Cerakote Ceramic Coatings
  • Charging Handle:  A2 Mil-Spec Charging handle
  • Bolt Carrier Group: TYPE-A QPQ W/REM POLISH BOLT CARRIER GROUP

  • CARRIER:
    • Semi-Auto Bolt Carrier
    • Gas Key (Staked)
    • Gas Key Hardened to USGI Specifications
    • Grade 8 Hardened Fasteners
  • BOLT ASSEMBLY:
    • Case Hardened, Shot Peened & MPI Tested
    • Extractor (Fully Assembled)

LOWER RECEIVER

  • Platform: GEN3 Precision Machined 7075-t6 Aluminum Lower Receiver
  • Finish: Option
    • Black – MIL-A-8625, Type-III, Class 2
    • Color – Type III Anodizing with Cerakote Ceramic Coatings
  • Trigger: TYPE-A CCS 2-Stage Straight Trigger (3.5lb.) – S7 Tool Steel/Heat Treated
  • Extension: 6-Position Adjustable Buffer Tube – Carbine Length
  • End Plate: Mil-Spec End Plate
  • Fire Selector: TYPE-A Ambi Billet 90°/70° Adjustable Short Throw Selector – Tool Steel
  • Magazine Release: TYPE-A Extended Billet Mag Release – Tool Steel
  • Lower Parts: Stainless Steel/Aluminum Detents & Springs

HANDGUARD/RAIL

  • Platform: Option
    • Knights Armament Rail System
  • Finish: Option
    • Black – MIL-A-8625, Type-III, Class 2
    • Color – Type-III Anodizing with Cerakote Ceramic Coatings

FURNITURE

  • Stock: CAR Stock – BLK
  • Grip: B5 P-GRIP – BLK

ACCESSORIES (INCLUDED W/RIFLE)

  • Magazine: DURMAG 30 Round Steel Magazine
  • Soft Case: 36″ Single Rifle Case

Colors Available (*Shown in Hardcoat Anodized Black)

Barrel Length

,

Caliber

Gas System

Rifle Type

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a BG Defense Co.
P.O. BOX 151487
Grand Rapids, MI 49515
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