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Posted: 3/31/2008 10:15:36 AM EDT
| How do I know what tripper pin I need for my lower receiver? .174 or .154? |
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Measure the holes in the receiver, or just tell us what receiver you have. If you have an older Colt lower, then you need the .174 FCG/pin size. pretty much the everything else will use the .154 FCG parts. Note: Colt was the only one that made the larger pin size receivers, not counting if someone converted another brand of receiver. |
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If you have an older Colt, you may need to measure your pin with a caliper; my late 70's vintage Colt SP1 has .154 pins. Just push your hammer pin out a little bit with a punch and measure the o.d. of the pin. Digital calipers can be had for less than $20.00 and are great to have around. |
I wouldn't consider myself an expert in Colt but, I'd assume a prior to the 89' ban no such thing existed. IIRC, it wan't until the early 90's before Colt started slitting its own throat. Sly. |
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