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F-1 Firearms new UDP-9-3G skeletonized pistol caliber carbine (PCC) is a collaboration with PCC powerhouse Quarter Circle 10 (QC10).  Utilizing the proven QC10 Small Frame Glock Lower Receiver, coupled with F-1 Firearms finishing touches; the UDP-9-3G flaunts the skeletonizing and cutting-edge design techniques that F-1 Firearms has become known for throughout the industry.  Situated on top of the F-1/QC10 skeletonized lower is our new UDP skeletonized upper receiver; designed to cosmetically flow directly into our new ultralight P7M rail system

P7M – AR-15 Hyper Lite Handguard

The new for 2018 P7M Rail System is our newest and LIGHTEST rail offered. Building on the theme of our UDR-2 Upper, we took skeletonizing to new heights with this rail. Utilizing 7075-T6 Aluminum allows F-1 to produce Rail Systems thinner and lighter than competitors using weaker 6-Series Aluminum for handguards. First designed in conjunction with our PCC offering, the P7M Rail mounts and flows seamlessly to the UDP-9 Upper in lengths as short as 5”. Due to the overwhelming response to the Rail System on the PCC, we offer the P7 in rifle lengths as well. The P7 features the M-LOK mounting system with slots on the bottom and both sides, as well as 2-4 QD Points depending on length of rail. The Picatinny Rail is scalloped and skeletonized as well, and the large flat bottom of the Rail features custom 1/8” knurling to aid in both grip and over barrier support.

  • 1.50″ inside diameter

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.

Item must ship to an FFL dealer. Must be 21 to purchase. Please have your dealer E-mail or fax a copy of their license, including your name and order number, to us at or fax to 636-547-2618. Please include YOUR dealers info in the SHIPPING OR comment section during checkout.




Billet Aluminum






AR9, Glock


F1 Firearms


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  • For all purchases of pistols, receivers, frames or suppressors, purchaser must be 21+
  • For all purchases of long guns, purchaser must be 18+
  • Know all your state laws before purchase is made

F-1 Firearms 7″ Chassis w/ UPD-9/P7M – Blue Polished

Our Price:

F-1 Firearms 7" Chassis w/ UPD-9/P7M - Blue Polished $1,510.00
  • MSRP$1,510.00

Total in stock: 0

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