F4-15 AMBI Matched Billet Receiver Set

(3 customer reviews)



The F4 Matched Billet Receiver set is a combination of modern machining capability and brilliant design. The F4-15 Matched Billet Receiver set now features full AMBI controls integrated into the lower receiver. The radical lines and recesses are strategically placed to cut weight and provide a streamlined design; making the F4-15 Matched Billet Receiver set the same weight as a forged mil-spec receiver set.

* Allow 1-2 weeks for Cerakote

Out of stock

SKU: F415-MBRS-G1 Category:


Technical Specs

  • Material: Precision CNC machined from Aerospace Aluminum¬†Billet 7075-T6
  • AMBI Bolt Catch (Hardware Included)
  • AMBI Mag Release (Hardware Included)
  • Flared Magwell (Wire EDM)
  • Forward Assist and Bolt Catch Set Screws (Replaces Roll Pins)
  • Bullet Picto-Graphed Short Throw Safety
  • Upper/Lower Takedown Tension Adjustment
  • Oversized and Beveled Trigger Guard to Accommodate Shooters Wearing Gloves
  • Low Profile Forward Assist
  • M4 Feed Ramps
  • Compatible with Mil Standard AR Upper and Lower Parts
  • American Made with American Metal
  • Weight:¬† 16.59 ounces


Additional information

Weight 2 lbs
Dimensions 11 × 8.5 × 5.5 in

3 reviews for F4-15 AMBI Matched Billet Receiver Set

  1. Russell (verified owner)

    I was lucky enough to get two of the first sets to be shipped out. These are things are flawless. The pictures online don’t do them justice. These are my first billet lowers. I have done research until I was blue in the face, looking for a good design with great features without breaking the bank, these are by far the best value on the market. One of the big items I looked at was customer service. I promise you, the guys at F4 are beyond the best. Fast, fast replies and dealt with me being the first pain in the ass customed. They have knocked it put of the park!

  2. Mike

    Machining and fit are perfect and runs like a top

  3. RYAN SAUNDERS (verified owner)

    excellent quality, tight fit. Ambi functions work flawlessly. paired with BA hanson 10.3 barrel and Geissele mk4 rail. best looking ar ive built and lots of positive comments on receiver set. i will note however, that the geissele rail and a midwest industries quad rail would NOT fit the upper due to contour of reciever. Milling or filing of certain rails may be required due to anti rotation tabs built in to rails. it took me ten minutes and a dremel to correct and now fits perfectly. other than that great product and will be purchasing again.

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