Aluminum receiver with black finish.

6061-T6 aluminum for receivers and frames Also new is the use of 6061-T6 aluminum for receivers and frames in place of the traditional (and heavier) steel in Auto-Ordnance’s lightweight models including the TA5.americanrifleman.org/articles/2009/9/22/auto-ordnance-ta5-pistol/

This particular model Thompson is made of aluminum construction. Hope this helps.

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Hi Urban, They're made of 6061-T6 aluminum SPECS -- Thompson 1927A-1 "Deluxe" semi automatic pistol .45 ACP 10.5" barrel 1-16.38 right hand twist 50 Round drum magazine Walnut grip & horizontal foregrip Aluminum receiver with black finish Blade front & open adjustable rear sights 23.3' overall length 5 lbs. 14.5 oz.

6061-T6 aluminum for receivers and frames
Also new is the use of 6061-T6 aluminum for receivers and frames in place of the traditional (and heavier) steel in Auto-Ordnance’s lightweight models including the TA5.americanrifleman.org/articles/2009/9/22/auto-ordnance-ta5-pistol/

Aluminum receiver Urban. Specifications & Features:
Thompson 1927A-1 "Deluxe" semi automatic pistol
.45 ACP
10.5" barrel
1-16.38 right hand twist
50 Round drum magazine
Walnut grip & horizontal foregrip
Aluminum receiver with black finish
Blade front & open adjustable rear sights
23.3' overall length
5 lbs. 14.5 oz.