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(PREORDER) AR G3/91/MP5 Machined Lower - 9C/9CT/9RS/91/A3S/51 - Full Kit
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AS Designs

(PREORDER) AR G3/91/MP5 Machined Lower - 9C/9CT/9RS/91/A3S/51 - Full Kit

$749.99
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Description

  • PREORDER PRODUCT - BATCH 1 - ETA FOR SHIPPING IS WEEK OF 9/26/25

WE WILL ONLY SELL THIS AS A COMPLETE KIT INITIALLY DUE TO THE COMPLEXITY OF INSTALL AND CUSTOM PARTS REQUIRED. THIS IS NOT CURRENTLY COMPATIBLE WITH GEISSELE TRIGGERS BUT WE WILL MAKE AN ADDITIONAL CHEAP PART TO ALLOW THE USE OF THEM!

We are now offering the AR MP5/G3/91 Lower fully machined and ready for super safe and ARC-Fire action! This lower will fit both MP5 and G3/91 full size models from PTR and can be swapped between them by just changing the ejector lever. This kit includes:

  • AR MP5/G3/91 Lower

    • CNC Billet machined from 7075-T6 Aluminum

    • Type III Hardcoat Anodized - Black

    • Markings laser engraved for SEMI - SUPER - SAFE positions for Super Safety or SAFE - SEMI - ARC for ARC-Fire

    • This fits PTR MP5 and G3/91 clones, including 9CT, 9C, 9RS, A3S, A3SK, GI, GIR, GIRK, PDWR, 51P, K3P, and may fit PTR 32 models (TBD). Please note: We do not support Century/CETME C308 models, but we may support the CA-3 as it’s made by PTR (TBD).

  • Custom Hammer - S7 Tool Steel, Black Phosphate, AR-15 Mil-Spec Fitment

  • Custom Ejector Lever Nut/Bushing (4140 Steel) and 2x 3MM Screws

  • Custom Ejector Lever (must designate MP5 or G3 specific, we will offer the other separately)

  • AS Designs Super Safety - CPM-10V Kit (Curved Trigger) OR ARC-Fire

  • Mil-spec FCG (disconnector and springs)

  • Anti-walk Pins

  • AR Grip (Mil-spec A2)

  • Slip Trip - 4140 Steel - Black Oxide

  • Slip Trip Guide - 7075-T6 Aluminum - Type III Hardcoat Anodized Black w/ PTFE (Teflon)

  • Test fit and fired for 5 semi rounds and 25 rounds super safe on our A3S or 9RS

 

You don’t need to add anything, this lower comes fully assembled with all parts. You will simply add the lower onto your upper and pin the new lower on and enjoy a super safe G3/91! This does not require a separate slip trip put on the bolt carrier, it is all contained within the lower itself! Note: We cannot guarantee perfect fitment to every single host, tolerance stacking is always a concern, but we have done everything possible to ensure proper fitment.

We strongly recommend using anti-walk pins (NOT anti-rotation).

 

We do not ship to the following states: CA, CO, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NY, and RI.

Note: All products are recommended to be installed by a qualified gunsmith.

 

The AR G3 was created by s3igu2 (with our support) and his approval was given for our product. Please visit his Twitter for updates, other designs, and to support his work: https://x.com/s3igu2

Credit also goes to UberPoor for his original work on the ARMP5 lower that inspired this product, please visit his Twitter for updates, other designs, and to support his work: https://x.com/UberPoor/

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