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RSR Stock #: ANGAA1045RSBA
Manufacturer Part #: AA1045RSBA
UPC: 867114000179

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Angstadt Arms, 1045, Semi-automatic, Stripped Upper/Lower Receiver, 45ACP/ 10MM, Anodized Finish, Black, Accepts Glock Pattern Magazines


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


"GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.m.b.H.  Neither RSR Group, Inc. nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H.  The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components.  For genuine GLOCK, Inc. and GLOCK Ges.m.b.H. products and parts visit

  • Accepts 45ACP and 10mm GLOCK Magazines
  • Last Round Bolt Hold Open
  • Flared Magwell for Faster Reloads
  • Integrated, Oversized Trigger Guard
  • Accepts Glock Pattern Magazines
  • Matched Slick Side Upper Receiver

Product Description

The Angstadt Arms 1045 matched receiver set is the foundation for a quality pistol caliber AR-15. Machined from a solid block of 7075-T6 billet aluminum, the 1045 receiver is compatible with 45ACP and 10mm GLOCK magazines. Featuring standard AR-15 controls and accepting most aftermarket components, the 1045 is instantly familiar to anyone experienced with the AR-15/M4 platform. To aid in reloads, the receiver features a flared magazine well and last round bolt hold open design which locks the bolt open on an empty magazine. The slick side upper receiver features an appropriately sized ejection port and no forward assist. The receiver set can be completed with standard mil-spec components.