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Questions & Answers
i bought a springfield armory scope years agowith a single hole attachment that screws into the reciever, is this compatible? Manufacturer Answer

The Luth-AR thumb screw is for the Luth-AR stocks and has a thread pitch of 1/4 x 20. The M1A has a thread pitch in the receiver that uses 12-32 UNEF

by Luth-AR, Manufacturer, November 26, 2025
Color: Black Additional Features: Aluminum Fabric/Material: Aluminum Weight: 0.4 oz

Code: 3FN-BSA-144LUTH-TS-01A

MPN: TS-01A

UPC: 859819007331

List: $15.99Save $1.00
$14.99

Product Info for Luth-AR Thumbscrew MBA-1 or MBA-3

High quality AR-15 thumbscrew that replaces the factory receiver-end cap and allows the shooter to easily install/detach an AR-15 bolt motor without gunsmithing. Fits between the buffer tube and the front of the receiver to securely lock the motor and its housing in place. Can be installed and removed without damage to the carbine. Our special high precision screws have nylon washers to ensure the best performance and reliability. If the buttstock is owned by an FFL or other weaponry, then this part is required to complete the installation. Order this part along with your buttstock for a complete assembly.image

Specifications for Luth-AR Thumbscrew MBA-1 or MBA-3:

Manufacturer: Luth-AR
Color: Black
Additional Features: Aluminum
Fabric/Material: Aluminum
Weight: 0.4 oz

Features of Luth-AR Thumbscrew MBA-1 or MBA-3

  • For MBA-1 or MBA-3

Package Contents:

  • Luth-AR Thumbscrew MBA-1 or MBA-3

Luth-AR Thumbscrew MBA-1 or MBA-3 Orderable Models

List of Orderable Models

  • Luth-AR Thumbscrew - Aluminum, Black, TS-01A , MPN: TS-01A , UPC: 859819007331 , Code: 3FN-BSA-144LUTH-TS-01A

Luth-AR Thumbscrew MBA-1 or MBA-3 Unavailable & Discontinued Models

List of Unorderable Models

  • Luth-AR Thumbscrew - Steel, TS-01 , MPN: TS-01 , UPC: 859819007324 , Code: 3FN-BSA-144LUTH-TS-01
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