2024 Keystone Bullet 221RBS vs 2025 Grand Design Momentum G-Class 28G

Detailed Comparison

Comparing the 2024 Keystone Bullet 221RBS to the 2025 Grand Design Momentum G-Class 28G reveals some interesting trade-offs that could influence your buying decision.

The Keystone Bullet 221RBS measures 29.0 ft in length at 3,300 lbs, compared to the Grand Design Momentum G-Class 28G's 43.0 ft and 12,000 lbs. GVWR ratings sit at 7,500 lbs and 15,200 lbs respectively.

Capacity-wise, expect to sleep 10 in the Keystone Bullet 221RBS versus 10 in the Grand Design Momentum G-Class 28G. With 1 and 0 slide-outs respectively, the parked floor plans differ significantly.

Tank capacities are a key off-grid consideration. The Keystone Bullet 221RBS carries 29 gal of fresh water, 59 gal gray, and 20 gal black. The Grand Design Momentum G-Class 28G offers 56 gal fresh, 80 gal gray, and 46 gal black. The Grand Design Momentum G-Class 28G has the edge for extended dry camping.

Budget-wise, the Grand Design Momentum G-Class 28G is listed at $70,000 compared to $70,000 for the Keystone Bullet 221RBS.

For family camping trips, the larger floor plan and additional berths make a real difference. For boondocking, the model with superior solar and battery setup will keep you comfortable off the grid longer. If you're going full-time, the larger tanks and more robust build quality matter enormously.

Take these specs as a starting point, then go see them in person — there's no substitute for stepping inside.