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Posted: 3/8/2006 12:29:54 PM EDT
[Last Edit: 3/9/2006 5:15:33 AM EDT by Ekie]
Like the SP1 These have "slab side" lower, large front pivot pin, full round late SP1 carrier with C marking and exposed firing pin. Unlike the SP1 the MPC marked bolts have a space between the M & P, they also have blue extractor buffer, A2 delta ring, A2 flash hider/peel washer, A2 port door, A2 grip. SPII rifles also have the A2 barrel, handguard, and buttstock (save the Carbines).

1984

301011 SP1 upper, shiney handguards

304436 SP1 upper, shiney handguards

1985-1989

310955 forward assit upper with large A2 plunger and CH forge code, shiney handguards

311XXX forward assist upper with tear drop forward assit

313XXX SP1 upper, shiney handguards

317788 forward assist upper with tear drop forward assit, shiney handguards

3212XX shiney handguards

327XX forward assist upper looks to have the large A2 plunger

339XXX CARBINE, forward assit upper with large A2 plunger CH forge code and shell deflector

339714 forward assit upper with large A2 plunger CH forge code and shell deflector, looks like it has matte guards

3476XX CARBINE, A2 upper with large A2 plunger CM forge code, fiberlite buttstock

354569 forward assit upper with A2 plunger CH forge code and shell deflector, looks like it has matte guards

Link Posted: 3/8/2006 3:44:05 PM EDT

Originally Posted By Ekie:
Unlike the SP1 the MPC marked bolts have a space between the M & P, they also have blue extractor buffer, A2 delta ring, A2 flash hider/peel washer, A2 port door, and A2 barrel grip guard and buttstock (save the Carbines).



Is this the difference in the 2? (SP1 and II)

Were they sequential in their production and simply model year improvements?

curious.

I'd love to see some more owners offer up their variants, so there can be a respectable sampling to add to the database

The more the merrier
Link Posted: 3/8/2006 3:56:12 PM EDT

Originally Posted By redfisher:

Originally Posted By Ekie:
Unlike the SP1 the MPC marked bolts have a space between the M & P, they also have blue extractor buffer, A2 delta ring, A2 flash hider/peel washer, A2 port door, and A2 barrel grip guard and buttstock (save the Carbines).



Is this the difference in the 2? (SP1 and II)

Were they sequential in their production and simply model year improvements?

curious.

I'd love to see some more owners offer up their variants, so there can be a respectable sampling to add to the database

The more the merrier



Far as I know "all" (never say that with Colt) SPII's had those features, which were different then the SP1. A2 grips were used on some late SP1's though.

The SPI and SPII series used up old parts that were dropped when the M16A1 went out of production, and M16A2 production ramped up. This process took a few years.

Yes, we need more examples, the earlier the better.
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