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Aim Sports M4 Carbine Length Quad Rail

The AIM Sports M4 Carbine Length Quad Rail (MT021) is a two-piece drop-in handguard that upgrades a standard AR-15/M4 carbine with 6.5 inches of full Picatinny rail on all four sides. Machined from aircraft-grade aluminum with a hard-coat black anodized finish, it accepts any standard 1913 Weaver/Picatinny accessory — lights, lasers, vertical grips, and BUIS — and ships with rail covers for unused sections. Installation requires no gunsmithing and works with most carbine-length direct impingement gas systems. A solid pick for shooters running a basic M4-pattern carbine who want a no-fuss accessory platform on a working budget.

In stock

SKU
MT021
  $24.53
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Description

Features

  1. Carbine-Length Drop-In Design — Two-piece handguard installs without gunsmithing and replaces the factory plastic furniture on any standard carbine-length AR-15/M4.
  2. Full Quad-Rail Coverage — 6.5 inches of Picatinny 1913 rail at the 12, 3, 6, and 9 o'clock positions for lights, lasers, vertical grips, optics, and BUIS.
  3. T-Marked Rail Slots — Numbered T-markings on all four rails let you index and return accessories to the exact same mounting position.
  4. Aircraft-Grade Aluminum Construction — Machined from 6061-T6 aluminum to keep weight down while standing up to hard use and recoil cycling.
  5. Hard-Coat Anodized Finish — Matte black Type III anodizing resists scratches, solvents, and corrosion for a long service life.
  6. Direct Impingement Compatible — Fits most carbine-length DI gas systems with standard front sight tower and delta ring.
  7. Picatinny/Weaver Accessory Standard — Accepts all standard 1913 Weaver and Picatinny-pattern accessories without adapters.
  8. Includes Rail Covers — Ships with ladder-style rail covers to protect unused sections and give the support hand a comfortable grip surface.
  9. Lightweight Profile — Slim quad-rail shell keeps the front end balanced and manageable for fast target transitions.

More Information

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Customer Reviews

4.7

3 reviews

100% of customers recommend this product

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Top customer reviews

  1. J. Miller

    Verified Buyer

    Exactly what I needed for my truck gun

    Value

    Overall Rating

    Price

    Quality

    Bought this to replace the cheap plastic handguard on my PSA carbine that I keep in the truck for property work. Install took maybe 10 minutes once I figured out the delta ring trick - just push down with your handguard tool (or a screwdriver wrapped in cloth if you're like me and can't find your tools). The two-piece design is genius, no gunsmithing needed at all. Threw a cheap UTG foregrip on the bottom rail and it hasn't moved even after banging around in the truck for three months. It's black anodized aluminum so it can take a beating. For the price you really can't beat it if you just need rail space for a light and grip. Way better than paying triple for something you're just gonna scratch up anyway.

    Drop-in install, no gunsmithing,Tough enough for truck/field use,Plenty of rail space for attachments

    Slightly heavier than I expected,Instructions could be clearer

  2. rick

    Verified Buyer

    Best quad rail for a budget build, hands down

    Value

    Overall Rating

    Price

    Quality

    If your building a beater AR on a budget and want to add some rail space without spending Daniell Defense money this is the move. Its a two piece drop in design so literally all you do is pop off the delta ring, slide the halves on, and tighten it down. Took me about 10 minutes with no special tools. The aircraft grade aluminum feels solid and the black anodized finish matches my upper pretty well. Ive got a Streamlight and a BCM vert grip mounted on it and theres zero flex or wobble.

    True drop-in install, no gunsmithing or special tools needed

    The cheese grater effect is real, get some rail covers unless you like shredding your hands

  3. Evan

    Verified Buyer

    Good value

    Value

    Overall Rating

    Price

    Quality

    Installation was quick and easy no hassle at all! For the price, I was expecting flimsy junk, but this thing actually feels solid and well-made. It does exactly what it’s supposed to without any fuss. If you’re looking for an affordable option that doesn’t sacrifice quality, this is a great pick
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