If I get a regular and a long BA crater bag with zips on opposite sides will I be able to zip them together?

Tech Specs:

BAG Material:

[Shell] nylon ripstop; [Lining] nylon taffeta 

Insulation:

600 Fill goose down 

Shape:

Mummy 

Draft Collar:

Yes 

Max User Height:

[Reg] about 6ft (183cm); [Long] about 6ft 6in (198cm) 

Shoulder / Hip / Foot Girth:

[Reg] 67 / 64 / 45in; [Long] 72 / 68 / 46in 

Stuff Size:

7.75 x 17in (20 x 43cm) 

Stuff or Storage Sack:

Yes, stuff sack 

Degree:

15F (-9C) 

Weight:

[Reg] 2lb 8oz (1134g); [Long] 2lb 13oz (1276g) 

PAD Material:

PU coated nylon 

Dimensions:

[Reg] 20 x 72 x 1.5in (51 x 183 x 4cm); [Long] 20 x 78 x 1.5in (51 x 198 x 4cm) 

Rolled Size:

[Reg] 5 x 21.5in (13 x 55cm) ; [Long] 5.5x21.5 (14 x 55cm) 

Self-Inflating:

Yes 

Weight:

[Reg] 2lbs 2oz (964g); [Long] 2lbs 5oz (1049g) 

Temp Rating:

-5F (-20.5C) 

Recommended Use:

Fall, spring camping 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China